package chapter3;
import java.util.Scanner;
/****************************************************************
 * Author：icynlau
 * Description:  点的位置
 * Date:2021/4/2  
 * ***************************************************************
 */
public class exc3_32 {
	public static void main(String[] args) {
		Scanner input=new Scanner(System.in);
		System.out.print("Enter three points for p0,p1,p2: ");
		double x0=input.nextDouble();
		double y0=input.nextDouble();
		double x1=input.nextDouble();
		double y1=input.nextDouble();
		double x2=input.nextDouble();
		double y2=input.nextDouble();
		String location="";
		if(((x1-x0)*(y2-y0)-(x2-x0)*(y1-y0))>0) {
			location=" on the left of ";
		}else if(((x1-x0)*(y2-y0)-(x2-x0)*(y1-y0))==0) {
			location=" on ";
		}else {
			location=" on the right of ";
		}
		
		System.out.println("( "+x2+" , "+y2+" ) is "+location+" the line from ( "+x0+" , "+y0+" ) to ( "+x1+" ,  "+y1+" )");
		
	}

}
